Provisions - Summary of Provisions (Detail) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disclosure of other provisions [abstract]
Beginning balance on January 1	€ 98
Additional provisions	89	€ 45
Disposal of a business	(1)	(1)
Unused amounts reversed through the income statement	0	(2)
Used during the year	(82)	(32)
Net exchange differences	(7)	5
Ending balance	97	98
Current	15	91
Non-current	€ 82	€ 7

The amount of additional other provisions made. [Refer: Other provisions]

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The amount of current provisions, including provisions for employee benefits. [Refer: Provisions]

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The decrease in other provisions resulting from the transfer of those provisions to liabilities included in disposal groups classified as held for sale. [Refer: Other provisions; Disposal groups classified as held for sale [member]]

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The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions]

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The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions]

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The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions]

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The amount of liabilities of uncertain timing or amount, including provisions for employee benefits.

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The amount reversed for unused other provisions. [Refer: Other provisions]

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